US10678014B2 - Mid-span clamp for aerial fiber optical cable system - Google Patents
Mid-span clamp for aerial fiber optical cable system Download PDFInfo
- Publication number
- US10678014B2 US10678014B2 US16/426,785 US201916426785A US10678014B2 US 10678014 B2 US10678014 B2 US 10678014B2 US 201916426785 A US201916426785 A US 201916426785A US 10678014 B2 US10678014 B2 US 10678014B2
- Authority
- US
- United States
- Prior art keywords
- span
- cable
- drop cable
- engagement surface
- mid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000835 fiber Substances 0.000 title description 3
- 230000003287 optical effect Effects 0.000 title description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 abstract description 19
- 238000005452 bending Methods 0.000 description 19
- 230000007704 transition Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4471—Terminating devices ; Cable clamps
- G02B6/4478—Bending relief means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/48—Overhead installation
- G02B6/483—Installation of aerial type
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
- G02B6/4433—Double reinforcement laying in straight line with optical transmission element
Definitions
- the disclosure relates generally to optical fiber cable support systems and more particularly to a mid-span optical fiber cable support system configured to support a drop cable with preferential bend characteristics while reducing bend strain generated from the mid-span supported drop cable.
- Optical fiber is increasingly being used for a variety of applications, including but not limited to broadband voice, video, and data transmission.
- Optical networks may use fiber optic cables in aerial and/or buried applications and each have special needs.
- aerial applications require hardware such as suspension clamps for hanging the cables under the tension of their own weight along with any environmental effects.
- a drop cable may be suspended from the main span cable at a mid-span location to distribute the fiber network outward from the main span cable at the mid-span location.
- the support system includes a main span cable including at least one optical fiber and having a preferential bend characteristic such that the main span cable defines a preferential bend axis.
- the main span cable supported at two separated supports along a length of the main span cable.
- the support system includes a drop cable including at least one optical fiber, and the drop cable has a first section extending along a portion of the length of the main span cable and a second portion extending away from the main span cable at a position between the two separated supports.
- the support system includes a mid-span clamp system engaging the main span cable.
- the mid-span clamp including a main span cable clamp engaging the main span cable and a drop cable clamp engaging the drop cable.
- the drop cable is supported from the main span cable such that the second portion of the drop cable extends away from the main span cable such that a drop cable load applied at the drop cable clamp is substantially perpendicular to the preferential bend axis of the main span cable.
- the support system including a main span cable clamp and a drop cable clamp supported from the main span cable clamp.
- the main span cable clamp includes a first engagement surface and a second engagement surface opposing the first engagement surface such that a body of a main span cable is engageable between the first and second engagement surfaces.
- the drop cable clamp is configured to support a drop cable in a position extending away from the first engagement surface.
- the first engagement surface has a height and a length greater than the height.
- the first engagement surface is a curved surface, convex relative to the drop cable clamp, and the curved surface defines a radius of curvature R 1 and an angle ⁇ .
- R 1 is between 100 mm and 500 mm
- ⁇ is between 3 degrees and 10 degrees.
- the mid-span drop cable support system includes a main span cable clamp.
- the main span cable clamp includes a first engagement surface having a height and a length greater than the height.
- the first engagement surface includes a convex curved section.
- the main span cable clamp includes a second engagement surface opposing the first engagement surface.
- the mid-span drop cable support system includes a support bracket extending outward and perpendicularly away from the first engagement surface.
- the mid-span drop cable support system includes a drop cable clamp supported from the support bracket.
- the convex curved section is convex relative to the drop cable clamp.
- the support bracket is shaped such that the drop cable clamp is located below an upper edge of the first engagement surface and above a lower edge of the first engagement surface.
- FIG. 1 shows a schematic top plan view of a mid-span optical fiber cable support system according to an exemplary embodiment.
- FIG. 2 is a perspective view of a mid-span clamp system according to an exemplary embodiment.
- FIG. 3 is a front plan view of a mid-span clamp system component defining a curved cable engagement surface according to an exemplary embodiment.
- FIG. 4 is a cross-sectional view showing a curved cable engagement surface according to an exemplary embodiment.
- FIG. 5 is a schematic view showing a main span cable engaged with a curved cable engagement surface under mid-span drop cable loading according to an exemplary embodiment.
- FIG. 6 is an exemplary schematic view showing high bend strain within a main span cable caused by an uncurved/low curvature engagement surface.
- FIG. 7 is a side view of a portion of mid-span clamp system showing a main span cable engaged with a curved engagement surface according to an exemplary embodiment.
- FIG. 8 is a side view of a mid-span clamp system component defining an opposing engagement surface according to an exemplary embodiment.
- FIG. 9 is a front view of a mid-span clamp system component defining an opposing engagement surface according to an exemplary embodiment.
- a mid-span drop cable support system includes a clamp that engages the main span cable at a mid-span location (e.g., a location suspended along the length of the main span cable between the distribution poles) to support a drop cable run outward to serve a location from the mid-span location.
- Main span cables e.g., all-dielectric self-supporting (ADSS) aerial system with cable strength members that are generally glass reinforced plastic rods
- ADSS all-dielectric self-supporting
- conventional mid-span clamping systems transfer the concentrated loading resulting from the lateral drop cable run to the main span in a manner that unnecessarily increases bending strain in the main span cable.
- a mid-span clamp and support system includes a main span cable clamp with specifically designed geometry that reduces bend strain that otherwise would be generated by loading from the mid-span lateral drop cable run.
- the mid-span clamp discussed herein has design features to minimize the bending strain in the main span by aligning the main span cable in the most favorable orientation and by supporting the main span with large radii contact regions.
- the main span cable clamp discussed herein includes a convex curved engagement surface having a sufficiently curved surface to provide contact and support to the main span cable under the loading generated by the mid-span position of the lateral drop cable run. This curvature is specifically designed to eliminate a sharp transition (or discontinuity) at the mid-span clamp under the drop cable loading which otherwise creates a concentration of bending strain.
- a mid-span clamp and support system is configured to position the drop cable clamp (and consequently the drop cable) relative to the main span clamp and the main span cable in a manner that reduces bending strain that may otherwise be experienced.
- the mid-span clamp and support system is configured such that the load vector from the mid-span lateral extension of the drop cable is substantially perpendicular to the preferential bend axis of the main span cable, which Applicant has found helps limit bending strain experienced in the main span cable.
- “preferential bend characteristic(s)” describe cables that have a major and a minor moment of inertia along different planes with strong and weak bending axes respectively.
- mid-span drop cable runs can be supported directly from ADSS main span cables without the need for separate steel messenger wires typically used in mid-span drop cable distribution.
- the mid-span clamp and support system discussed herein allows for longer length main span lengths because more of the maximum allowable strain in the main span cable can be allocated to tension from main span length loading.
- the mid-span clamp and support system discussed herein includes a drop cable clamp coupled to the mid-span clamp via a rotational coupling.
- the rotational coupling allows the drop cable clamp and drop cable extending from the mid-span location to rotate freely relative to the mid-span clamp under various loading conditions (i.e., dead weight, wind, ice and combinations thereof) to allow the drop cable to bend about the preferential axis (minor area moment of inertia axis) thereby minimizing bending strain in the drop cable.
- FIG. 1 is top schematic view of a mid-span optical fiber cable support system 10 according to an exemplary embodiment.
- system 10 includes a main span cable 12 that includes a span section 14 located between connections at two supports 16 and 18 .
- Supports 16 and 18 may be aerial support structures such as utility poles, and in specific embodiments, main span cable 12 is an all-dielectric self-supporting (ADSS) cable, as shown for example in FIG. 2 .
- ADSS all-dielectric self-supporting
- main span cable 12 is a non-cylindrical cable having preferential bend characteristics.
- main span cable 12 includes a central cavity 19 defined within an oblong outer cable jacket 20 .
- First and second strength members 22 and 24 are located within (e.g., embedded within) cable jacket 20 on either side of cavity 19 , and in this arrangement main span cable 12 defines a preferential bend axis 46 (e.g., a minor area moment of inertia axis) that intersects the center points of strength members 22 and 24 and that also traverses central cavity 19 .
- Main span cable 12 includes one or more optical fibers 26 (e.g., optical fiber ribbon(s), optical fiber ribbon stack(s), buffer tube with loose optical fibers, etc.) located within cavity 19 .
- optical fibers 26 e.g., optical fiber ribbon(s), optical fiber ribbon stack(s), buffer tube with loose optical fibers, etc.
- Mid-span optical fiber cable support system 10 also includes a drop cable 30 .
- drop cable 30 includes one or more optical fiber (typically having less optical fibers than main span cable 12 ).
- drop cable 30 has a first section 32 that extends along or parallel to a portion of main span cable 12 from a splice point 34 at which optical fiber(s) of drop cable 30 is spliced to optical fiber(s) of main span cable 12 .
- splice point 34 is supported on utility pole 16 .
- Drop cable 30 also includes a second portion 36 which extends outward away from main span cable 12 at a mid-span location to provided network services to an end user 38 (e.g., a home, business, etc.).
- mid-span location relates to a position along main span cable 12 that is at least 10% of the length main span cable 12 between support poles 16 and 18 .
- the mid-span location is generally located at the middle of the portion of main span cable 12 between support poles 16 and 18 .
- mid-span optical fiber cable support system 10 also includes a mid-span clamp system 40 .
- mid-span clamp system 40 has a first clamp that engages main span cable 12 at the desired mid-span locate, and second clamp (e.g., a p-clamp, a wedge clamp, etc.) that engages the drop cable.
- second clamp e.g., a p-clamp, a wedge clamp, etc.
- the mid-span clamp system 40 is configured to both support first section 32 of drop cable 30 generally along main span cable 12 , and to also support second section 36 of drop cable 30 as it extends away (e.g., in a horizontal direction) from main span cable 12 .
- directing second section 36 of drop cable 30 away from main span cable 12 tends to apply a lateral load represented by arrow 42 to main span cable 12 , which tends to deflect main span cable 12 from its unloaded, natural path between supports 16 and 18 shown as dotted line 41 .
- the loading represented by arrow 42 tends to cause bending strain within the strength members of main span cable 12
- mid-span clamp system 40 is configured, arranged and shaped to limit/reduce the bend strain that would otherwise be experienced by main span cable 12 .
- mid-span clamp system 40 includes a main span cable clamp 43 configured to engage the outer surface of main span cable 12 at a mid-span location, and a drop cable clamp 44 (shown schematically in broken lines) that supports drop cable 30 allowing second section of drop cable 36 to extend away from main span cable 12 in the direction of end user 38 .
- mid-span clamp system 40 is arranged such that drop cable section 36 extends away from main span cable 12 in a direction substantially perpendicular (e.g., 90 degrees plus or minus 10%) to the preferential bend axis 46 of main span cable 12 .
- substantially perpendicular e.g. 90 degrees plus or minus 10%
- bend strain within main span cable 12 may be reduced.
- mid-span clamp system 40 is oriented such that preferential bend axis 46 is positioned in a substantially vertical direction (e.g., with plus or minus 15 degrees from vertical, and drop cable section 36 extends in a substantially horizontal direction away from main span cable 12 .
- main span cable clamp 43 is also designed to limit bend strain that may otherwise be experienced because of the interface between main span cable clamp 43 and main span cable 12 due to drop cable loading 42 .
- the portion of main span cable clamp 43 shown in FIG. 2 ) that includes a first engagement surface 50 and a second engagement surface 52 that opposes the first engagement surface 50 .
- first engagement surface 50 generally faces toward drop cable clamp 44
- second engagement surface 52 generally faces away from drop cable clamp 44 .
- first engagement surface 50 engages the outer surface of one side of main span cable 12
- second engagement surface 52 engages the outer surface of the other side of main span cable 12 such that main span cable 12 is clamped between engagement surfaces 50 and 52 .
- mid-span clamp system 40 includes a locking or tightening system 54 .
- locking system 54 includes a cap screw 56 , washer 58 and spring 60 (e.g., a helical spring, a Belleville spring stack, etc.).
- spring 60 acts to maintain clamping force on the cable throughout temperature changes and relaxation of the cable.
- engagement surface 50 has a height H 1 , and a length L 1 that is greater than H 1 .
- H 1 is selected to closely match the height of main span cable 12 (e.g., dimension along preferential bend axis 46 ).
- engagement surface 50 includes a central flat section 51 , having a length L 2 shown in FIG. 4 , and flat section 51 is flanked by a pair of curved surfaces 53 having the curvature discussed herein.
- Length L 1 is selected to provide an engagement surface 50 of sufficient length to provide the level of curvature discussed below.
- H 1 is between 16 mm and 20 mm, specifically between 17 mm and 18 mm
- L 1 is between 100 mm and 170 mm and specifically between 125 mm and 135 mm.
- main span clamp 43 is arranged such that length L 1 of engagement surface 50 is substantially parallel to the longitudinal axis of main span cable 12 (shown in broken lines in FIG. 4 ).
- engagement surface 50 is generally curved in the length direction and is convex relative to at least the loading vector of drop cable section 36 represented by arrow 42 .
- FIG. 5 exaggerates the curvature of engagement surface 50 .
- the curvature of engagement surface 50 is defined by a radius curvature R 1 and an angle ⁇ .
- angle ⁇ is angle measured from the tangent between the center flat section and curved section of surface 50 and one of the ends of surface 50 .
- the angle ⁇ of curved surfaces 53 of engagement surface 50 must be greater than the load angle A induced in main span cable 12 due to the maximum lateral loading (e.g., the maximum tension of drop cable section 36 experienced).
- the maximum lateral loading e.g., the maximum tension of drop cable section 36 experienced.
- R 1 is between 100 mm and 500 mm and specifically between 350 mm and 400 mm, and ⁇ is between 3 degrees and 10 degrees and specifically between 4 degrees and 7 degrees. In a specific embodiment, R 1 and angle ⁇ are selected such that bending strain within main span cable 12 does not exceed 0.3%.
- FIG. 6 shows a clamp surface having a curvature that is insufficient to limit bend strain.
- FIG. 6 when the curvature of the engagement surface is less than the load angle A, an abrupt transition 64 in the angle of main span cable 12 occurs as main span cable exits the clamp. This sharp bend transition causes high bending strain in the main span cable 12 .
- FIG. 6 by comparing FIG. 6 to FIG. 5 , the decrease in bend strain provided by curved surface 50 can be seen.
- r is the radius of the strength members (for circular cross section strength members)
- R is the bend radius of the cable
- bending strain imposed on the main span cable 12 by drop cable 30 at mid-span clamp system 40 should be limited to a fraction of the allowable strain of the strength members of main span cable 12 .
- bending strain at the drop cable connection through the design of curved engagement surface 50 discussed herein, more of the allowable strain is available for main span tension thereby permitting longer span length for given loading conditions.
- the design of curved engagement surface 50 discussed herein controls the strength member bending strain in the main span cable to below a prescribed value regardless of drop span tension by limiting the bend radius of the main span cable to R 1 within mid-span clamp system 40 due to the engagement between surface 50 and main span cable 12 .
- mid-span clamp system 40 includes additional structures that further facilitate reduction of strain due to mid-span drop cable attachment.
- mid-span clamp system 40 is configured to position drop cable clamp 44 (and consequently drop cable span 36 and the associated load) relative to main span cable 12 in manner that reduces bend strain and/or torsion.
- mid-span clamp system 40 holds main span cable 12 and drop cable span 36 in position relative to each other such that drop span cable load 42 are normal to the preferential bend axis 46 which acts to reduce/prevent undesirable rotation of the main span cable 12 about its longitudinal axis as it seeks to bend about its preferential axis. Without such alignment between the preferential bend axis 46 and the drop cable load 42 , the undesirable rotation can introduce additional strain in the strength members of the main span cable thereby reducing the allowable span length.
- mid-span clamp system 40 includes a support bracket 70 that extends outward and perpendicularly away from engagement surface 50 .
- An eyelet 72 is located at one end of support bracket 70 and is coupled to drop cable clamp 44 such that drop cable clamp 44 and drop cable span 36 are positioned relative to main span cable 12 and engagement surface 50 as discussed herein.
- support bracket 70 is shaped such that the drop cable load vector 42 experienced at eyelet 72 and the central longitudinal axis 76 lie in a plane that is perpendicular to preferential bend axis 46 (see FIG. 2 ) of main span cable 12 . It is believed that by reducing eccentricity between the eyelet 72 (and consequently the drop cable load 42 experienced at eyelet 72 ) and the central longitudinal axis 76 of main span cable 12 , the bending moment resulting from the drop cable forces 42 transferred to the eyelet 72 are reduced.
- support bracket 70 supports drop cable clamp 44 such that the drop cable load 42 is positioned to be perpendicular to preferential bend axis 46 .
- eyelet 72 is positioned such that drop cable span 36 and the drop cable load 42 is experienced between uppermost and lowermost edges (in the orientation of FIG. 7 ) of engagement surface 50 .
- support bracket 70 is shaped with an angled section 74 that positions drop cable clamp 44 such the drop cable load vector lies on the plane bisecting engagement surface 50 .
- support bracket 70 is shaped such that the drop cable span 36 is positioned relative to main span cable 12 such that the drop cable load 42 intersects preferential bend axis 46 at 90° midway between edges of the main span cable 12 .
- eyelet 72 is positioned such that drop cable clamp 44 and drop cable span 36 are spaced a horizontal distance D 1 from engagement surface 50 .
- D 1 is a short distance to limit the bending moment experienced by main span cable 12 from vertical components drop cable load 42 .
- D 1 is between 25 mm and 40 mm and more specifically between 28 mm and 35 mm.
- second engagement surface 52 is shown located on plate 62 .
- surface 52 may be knurled or include a roughened texture to facilitate a tight grip onto the outer surface of main span cable 12 .
- plate 62 includes a generally vertical slot 80 that is sized to receive cap screw 56 and permit plate 62 to translate relative to main span cable clamp 43 to install on the main span cable 12 prior to tightening cap screw 56 discussed above regarding FIG. 2 .
- drop cable clamp 44 may include one or more suitable clamping structure along with a rotatable or flexible linkage joining drop cable clamp 44 to eyelet 72 .
- drop cable clamp 44 may be a P-clamp or a wedge clamp coupled to eyelet 72 .
- the bail of drop cable clamp 44 is flexible and/or rotatable to permit drop cable 30 to rotate about its axis so it can align its preferential bend direction for all loads or combined loads (i.e. deadweight, wind, ice).
- an additional linkage or a swivel can be provided that allows drop cable 30 to rotate up to 160 degrees about the drop cable 30 's longitudinal axis.
- drop cable clamp 44 is integral with support bracket 70 .
- the integral drop clamp 44 allows rotation about both axes orthogonal to main span longitudinal axis 76 to minimize bending strain in both the main span cable 12 and drop cable 30 .
- drop cable clamp 44 utilizes a revolute joint to transfer the drop span load 42 to the main span cable 12 while permitting the main span cable 12 to rotate about its axis to self-align the preferential bend axis 46 of the cable.
- mid-span clamp system 40 is configured to be attached onto main span cable 12 from a position (e.g., the ground) located below the main span cable 12 .
- clamp system 40 may include biasing element(s) that urge engagement surfaces 50 and 52 onto main span cable 12 .
- a tool is provided that engages the biasing element such that surfaces 50 and 52 are held apart while mid-span clamp system 40 is positioned around main span cable 12 from the ground. When in place, the tool releases the biasing element, allowing the biasing element to force surfaces 50 and 52 into engagement with the outer surface of main span cable 12 .
- the biasing element is integral with the material of the plates defining surfaces 50 and 52 .
- the biasing element is integral with the material of bracket 70 .
- the biasing element is a spring that engages at least one of bracket 70 and/or the plates defining surfaces 50 and 52 .
- the length of main span cable 12 between supports 16 and 18 is 50 m, with a 2% sag.
- the length of second section 36 of drop cable 30 is 20 m which is attached to the main span cable 12 midway between supports 16 and 18 .
- the load angle is approximately 3.2 degrees.
- angle ⁇ is greater than 3.2 degrees and more specifically is between 4 degrees and 10 degrees. Applicant has found that given these conditions and with radius R 1 greater than or equal to 380 mm, the total strain experienced by strength members 22 and 24 remains below the allowable strain limits of approximately 1% and well below ultimate strain limits of 2.5% minimum.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
Description
T/AE+r/R≤ε Eq. 1
Where:
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/426,785 US10678014B2 (en) | 2016-11-16 | 2019-05-30 | Mid-span clamp for aerial fiber optical cable system |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662422832P | 2016-11-16 | 2016-11-16 | |
US15/811,803 US10338335B2 (en) | 2016-11-16 | 2017-11-14 | Mid-span clamp for aerial fiber optical cable system |
US16/426,785 US10678014B2 (en) | 2016-11-16 | 2019-05-30 | Mid-span clamp for aerial fiber optical cable system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/811,803 Division US10338335B2 (en) | 2016-11-16 | 2017-11-14 | Mid-span clamp for aerial fiber optical cable system |
Publications (2)
Publication Number | Publication Date |
---|---|
US20190278041A1 US20190278041A1 (en) | 2019-09-12 |
US10678014B2 true US10678014B2 (en) | 2020-06-09 |
Family
ID=62106862
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/811,803 Expired - Fee Related US10338335B2 (en) | 2016-11-16 | 2017-11-14 | Mid-span clamp for aerial fiber optical cable system |
US16/426,785 Active US10678014B2 (en) | 2016-11-16 | 2019-05-30 | Mid-span clamp for aerial fiber optical cable system |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/811,803 Expired - Fee Related US10338335B2 (en) | 2016-11-16 | 2017-11-14 | Mid-span clamp for aerial fiber optical cable system |
Country Status (4)
Country | Link |
---|---|
US (2) | US10338335B2 (en) |
EP (1) | EP3542200A4 (en) |
CA (1) | CA3044077A1 (en) |
WO (1) | WO2018132176A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11287595B2 (en) * | 2018-12-04 | 2022-03-29 | Hubbell Incorporated | Fiber optic dead-end cable clamp with central actuator |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10338335B2 (en) | 2016-11-16 | 2019-07-02 | Corning Research & Development Corporation | Mid-span clamp for aerial fiber optical cable system |
BR202017009256Y1 (en) * | 2017-05-02 | 2020-03-24 | Valcir Fabris | CABLE RETENTION DEVICE |
EP4252058A1 (en) * | 2020-11-30 | 2023-10-04 | Corning Research & Development Corporation | Emergency cable breaking mechanism |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6493500B1 (en) | 2000-09-19 | 2002-12-10 | Korea Telecom | Method for mid-span branching of optical fiber cable |
US20030080555A1 (en) * | 2000-12-27 | 2003-05-01 | Nkf Kabel B.V. | Y-branch splittable connector |
US20040035984A1 (en) | 2002-08-22 | 2004-02-26 | Senior Industries Inc. | Drop wire clamp |
US20080253722A1 (en) * | 2007-04-12 | 2008-10-16 | Erik Gronvall | Fiber optic telecommunications cable assembly |
US20140023159A1 (en) | 2009-07-13 | 2014-01-23 | National Chiao Tung University | Method For Selecting Transmitting Points In A Communication System |
US20140231598A1 (en) * | 2011-08-17 | 2014-08-21 | Corning Optical Communications LLC | Suspension clamp for cables having preferential bend |
US20160003376A1 (en) * | 2013-03-01 | 2016-01-07 | Hubbell Incorporated | Cable suspension clamp |
US9362635B2 (en) | 2012-07-23 | 2016-06-07 | John Mezzalingua Associates, LLC | Minimally invasive mid-span grounding clamp and method of use thereof |
US20170235082A1 (en) * | 2016-02-12 | 2017-08-17 | Commscope Technologies Llc | Device for branching a cable from a mid-span location |
US20180031795A1 (en) | 2016-07-29 | 2018-02-01 | Hubbell Incorporated | Spring assist cable clamps |
US20180136428A1 (en) | 2016-11-16 | 2018-05-17 | Corning Research & Development Corporation | Mid-span clamp for aerial fiber optical cable system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008125216A (en) * | 2006-11-10 | 2008-05-29 | Kanefuji Sangyo Kk | Cable bundling device |
US20130031795A1 (en) | 2011-08-02 | 2013-02-07 | Shane Lovett | Rod End Wear Detection Device |
-
2017
- 2017-11-14 US US15/811,803 patent/US10338335B2/en not_active Expired - Fee Related
- 2017-11-15 EP EP17890860.4A patent/EP3542200A4/en not_active Withdrawn
- 2017-11-15 WO PCT/US2017/061881 patent/WO2018132176A2/en unknown
- 2017-11-15 CA CA3044077A patent/CA3044077A1/en not_active Abandoned
-
2019
- 2019-05-30 US US16/426,785 patent/US10678014B2/en active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6493500B1 (en) | 2000-09-19 | 2002-12-10 | Korea Telecom | Method for mid-span branching of optical fiber cable |
US20030080555A1 (en) * | 2000-12-27 | 2003-05-01 | Nkf Kabel B.V. | Y-branch splittable connector |
US20040035984A1 (en) | 2002-08-22 | 2004-02-26 | Senior Industries Inc. | Drop wire clamp |
US20080253722A1 (en) * | 2007-04-12 | 2008-10-16 | Erik Gronvall | Fiber optic telecommunications cable assembly |
US20140023159A1 (en) | 2009-07-13 | 2014-01-23 | National Chiao Tung University | Method For Selecting Transmitting Points In A Communication System |
US20140231598A1 (en) * | 2011-08-17 | 2014-08-21 | Corning Optical Communications LLC | Suspension clamp for cables having preferential bend |
US9362635B2 (en) | 2012-07-23 | 2016-06-07 | John Mezzalingua Associates, LLC | Minimally invasive mid-span grounding clamp and method of use thereof |
US20160003376A1 (en) * | 2013-03-01 | 2016-01-07 | Hubbell Incorporated | Cable suspension clamp |
US20170235082A1 (en) * | 2016-02-12 | 2017-08-17 | Commscope Technologies Llc | Device for branching a cable from a mid-span location |
US20180031795A1 (en) | 2016-07-29 | 2018-02-01 | Hubbell Incorporated | Spring assist cable clamps |
US20180136428A1 (en) | 2016-11-16 | 2018-05-17 | Corning Research & Development Corporation | Mid-span clamp for aerial fiber optical cable system |
Non-Patent Citations (3)
Title |
---|
International Search Report and Written Opinion of the International Searching Authority; PCT/US17/61881; dated Jul. 2, 2018; 11 Pages; ISA/US Commissioner for Patents. |
Thomas & Betts; DIAMOND®/SACHS®; Universal Messanger Drop Wire Clamp-CATV; 2004; 36 Pages. |
Thomas & Betts; DIAMOND®/SACHS®; Universal Messanger Drop Wire Clamp—CATV; 2004; 36 Pages. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11287595B2 (en) * | 2018-12-04 | 2022-03-29 | Hubbell Incorporated | Fiber optic dead-end cable clamp with central actuator |
US20220413246A1 (en) * | 2018-12-04 | 2022-12-29 | Hubbell Incorporated | Fiber optic dead-end cable clamp |
Also Published As
Publication number | Publication date |
---|---|
WO2018132176A3 (en) | 2018-08-23 |
US20190278041A1 (en) | 2019-09-12 |
WO2018132176A2 (en) | 2018-07-19 |
US20180136428A1 (en) | 2018-05-17 |
CA3044077A1 (en) | 2018-07-19 |
EP3542200A4 (en) | 2020-10-14 |
US10338335B2 (en) | 2019-07-02 |
EP3542200A2 (en) | 2019-09-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10678014B2 (en) | Mid-span clamp for aerial fiber optical cable system | |
EP2745364B1 (en) | Suspension clamp for cables having a preferential bend | |
US10795108B2 (en) | Spring assist cable clamps | |
US20170241570A1 (en) | Cable suspension clamp | |
US20150252916A1 (en) | Lateral Sway Brace | |
US7672556B2 (en) | Flat design composite drop fiber cable with mid-span access capability | |
US10649169B2 (en) | Sliding jaw drop clamp | |
US10705301B2 (en) | Spring assist cable clamp | |
US11287595B2 (en) | Fiber optic dead-end cable clamp with central actuator | |
US10557568B2 (en) | Multi-sided cable clamps | |
EP3451037A1 (en) | Method for gripping optical fiber cable, and optical fiber cable gripping tool | |
CN214174713U (en) | Anti-slip and anti-drop optical fiber cable clamp | |
US8979389B2 (en) | Fiber optic cable strength member bracket | |
US6862861B1 (en) | Utility bracket | |
US9923353B2 (en) | Cable suspension | |
RU2212742C2 (en) | Support for fastening long-measuring parts |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CORNING RESEARCH & DEVELOPMENT CORPORATION, NEW YO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MILLER, ALLEN MICHAEL;REEL/FRAME:049323/0416 Effective date: 20171109 Owner name: CORNING RESEARCH & DEVELOPMENT CORPORATION, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MILLER, ALLEN MICHAEL;REEL/FRAME:049323/0416 Effective date: 20171109 |
|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE AFTER FINAL ACTION FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |